Question

a researcher wants to explore the relationship between the following two variables, weight 1 and weight 2. suppose that weight 1 is the weight (in pounds) of a sample of five individuals before beginning a weight - loss diet, and weight 2 is the weight in (pounds) of the same five individuals after the diet. if we would like to test the effectiveness of the diet, which of the following is the appropriate inference method to analyze these data? a. matched pairs b. inference for regression c. two independent samples

Explanation:

Matched pairs are used when we have two related observations (in this case, the same individuals' weights before and after the diet). Inference for regression is for predicting a variable based on another. Two independent samples are for comparing two unrelated groups. Since it's the same individuals measured twice (before and after), matched pairs is appropriate.

Answer:

A. Matched pairs